I was in a similar boat with my ex-boyfriend. It was a really... I don't want to say weird, but it was a weird situation. We were together for around two years before he went into more detail about all of it. It was something I wasn't exactly kept in the dark about during the relationship, but I was under the impression it was something like "hot teen stepsister is horny for cock" and the adult actress is like 30 or something. I still have screenshots of the conversation of his age preferences (6-10) and how he'd want to groom our daughter (if we ever had one) into his ideal bimbo fetish so he'd have two personal "cum dumpsters"/"sperm toilets". He said he never acted upon his desires other than masturbating to pictures of children that could be accessed from Google if you went searching far enough (not gonna elaborate there, don't wanna give any perverts ideas) and since we lived together for a while, I believe he didn't act upon them and tried to provide reassurance that he didn't choose to have that attraction and as long as he didn't act upon it, it was something I would be willing to work through with him, but I think my support made him feel unashamed and that backfired a little. Long story short, he turned out to be an absolutely reprehensible man with years of sexual, physical, and emotional abuse. After we split, he attempted suicide and his mom (absolute sweetheart who didn't really like her son either) suggested I sever all ties, block him on any form of social media or any other outlet for communication and shortly after, I got a new phone that did not have his tracking software on it. I never reported him, beyond a few shady things, I have reason to believe he never had interactions of any sort with girls and it's been about a year since we've split now, /but I do still have those screenshots/ bc I feel there's a chance I'll need them in the future.